//
//  UIColor+HYExtension.m
//  Object-CPlayGround
//
//  Created by 韩丛旸 on 16/8/2.
//  Copyright © 2016年 韩丛旸. All rights reserved.
//

#import "UIColor+HYExtension.h"

@implementation UIColor (HYExtension)

+ (UIColor *)hy_randomColor
{
    
    CGFloat red   = arc4random_uniform(256) / 255.0;
    CGFloat green = arc4random_uniform(256) / 255.0;
    CGFloat blue  = arc4random_uniform(256) / 255.0;

    return [UIColor colorWithRed:red green:green blue:blue alpha:1];
}

+ (UIColor *)hy_colorWithHexString:(NSString *)colorString
{
    NSString *cString = [[colorString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];

    // String should be 6 or 8 characters
    if ([cString length] < 6) return [UIColor whiteColor];

    // strip 0X if it appears
    if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
    if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
    if ([cString length] != 6) return [UIColor whiteColor];
    // Separate into r, g, b substrings
    NSRange range;
    range.location = 0;
    range.length = 2;
    NSString *rString = [cString substringWithRange:range];

    range.location = 2;
    NSString *gString = [cString substringWithRange:range];

    range.location = 4;
    NSString *bString = [cString substringWithRange:range];

    // Scan values
    unsigned int r, g, b;
    [[NSScanner scannerWithString:rString] scanHexInt:&r];
    [[NSScanner scannerWithString:gString] scanHexInt:&g];
    [[NSScanner scannerWithString:bString] scanHexInt:&b];

    return [UIColor colorWithRed:((float) r / 255.0f)
                           green:((float) g / 255.0f)
                            blue:((float) b / 255.0f)
                           alpha:1.0f];
}

@end
